This article presents the results of a pedagogical experiment, during which the influence of a physical education lesson, organized according to the principle of circular training, on the health of 10-11-year-old schoolchildren, boys and girls. Experimental studies were carried out for six months, from November to May. In the course of the work, initial and final testing of indicators of the health status of schoolchildren was carried out, which made it possible to identify their dynamics and carry out a comparative analysis of the indicators of the control and experimental groups. Initial testing did not reveal a significant difference between the studied parameters of both groups. During the final testing of schoolchildren, it was revealed that the experimental group had a higher adaptive potential for physical activity, greater reserve capacity of the cardiovascular system compared to the control group. This, in our opinion, is the result of the training effect on the body of physical activity performed in the process of applying the method of circular training at a physical education lesson.